Date: Tue, 14 Jul 2020 08:35:53 +0000 From: bugzilla-noreply@freebsd.org To: usb@FreeBSD.org Subject: [Bug 247964] Low read throughput on Sandisk Extreme external SSD Message-ID: <bug-247964-19105@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=247964 Bug ID: 247964 Summary: Low read throughput on Sandisk Extreme external SSD Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: usb Assignee: usb@FreeBSD.org Reporter: thj@FreeBSD.org With a 250GB Sandisk Extreme external SSD read performance with FreeBSD is lower than Linux and macOS. I have tested this on FreeBSD on a Thinkpad x270 and 10th Generation Intel NUC. On Linux on the Intel NUC and from MacOS on a 2018 Macbook pro. I evaluated read and write performance by using dd (with only path adaptations for Linux and macOS) on the device: dd if=/dev/zero of=/dev/da0 bs=1m count=50000 dd if=/dev/da0 of=/dev/null bs=1m count=50000 On all platforms write speed is approximately 200MB/s On Linux and macOS read speed is approximately 500MB/s, while on FreeBSD it is approx 200MB/s -- You are receiving this mail because: You are the assignee for the bug.help
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